alluvial soil

Alluvial soil is the most widely spread soil. The entire northern plains are made up of alluvial soil .IG is highly fertile soil , hence , intensively cultivated and densly populated . it have been deposited by the three important Himalayan river system , the Indus , the Ganga and the Brahmaputra. 
Importance of alluvial soil . 
It contain potash , phosphoric acid and lime which are ideal for the growth of sugarcane , paddy , wheat ,bother cereal and pulse crops .
It usually found in Rajasthan , Gujarat , Eastern coastal plains particularly on the deltas of the Mahanadi  , the Godaveri , the Krishna and the Kaveri .
Soils in the drier areas are more alkaline and can be productive after proper treatment and irrigation.
Coarse soil are more common in piedmont plains such as Duars , Chos , Terai.
According to their age alluvial soil is classified as old soil as Bhangar and the new alluvial soil as khadar .
The Bhangar soil has higher concentration of kanker nodules than the khadar , which is more fertile.